Sorry my bad:
Here is what I am looking for:
In below example I have $var1 value as 10 and $var2 as 5. For each iteration I want values to switch between these two.
i.e.
Iteration 1: $var1=10 and $var2=5
Iteration 2: $var1=5 and $var2=10
Iteration 3: $var1=10 and $var2=5
Iteration 4: $var1=5 and $var2=10
so on and so forth.
I tried something like below which is incorrect
use strict;
use warnings;
my $var1=10;
my $var2=5;
foreach(1..10) {
$var1=$var2;
$var2=$var1;
print "Var1 is:$var1\n";
print "Var2 is:$var2\n";
}

Went to join the gridlock to see it
Held an eclipse party
Watched a live feed
I cn"t see tge kwubosd to amswr thus
I tried to see it, but 8000 miles of rock got in the way
What eclipse?
Wanted to see it, but they wouldn't reschedule it
Read the book instead